QPrinter: fix unit tests for special case when no printer is default

The unit tests of QPrinter assume that a printer which is default-
initialized is the same printer as the default printer. However, when
no printer is set to default, this is not the case. When no printer
is the default printer, a default-initialized QPrinter will be the
first printer found.
This patch adapts the unit tests to work also when no printer is the
default printer, even though printers are available.

Change-Id: I4967e5b1c4fb8a7c33c911184289ec5cd283fc58
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 7 insertions, 1 deletions

diff --git a/tests/auto/printsupport/kernel/qprinter/tst_qprinter.cpp b/tests/auto/printsupport/kernel/qprinter/tst_qprinter.cpp
index fef7c4905d..81a53bd6b6 100644
--- a/tests/auto/printsupport/kernel/qprinter/tst_qprinter.cpp
+++ b/tests/auto/printsupport/kernel/qprinter/tst_qprinter.cpp
@@ -1516,7 +1516,13 @@ void tst_QPrinter::outputFormat()
         QCOMPARE(printer.printerName(), QString());
     } else {
         QCOMPARE(printer.outputFormat(), QPrinter::NativeFormat);
-        QCOMPARE(printer.printerName(), QPrinterInfo::defaultPrinter().printerName());
+
+        // If no printer is default, the first available printer should be used.
+        // Otherwise, the default printer should be used.
+        if (QPrinterInfo::defaultPrinter().isNull())
+            QCOMPARE(printer.printerName(), QPrinterInfo::availablePrinters().at(0).printerName());
+        else
+            QCOMPARE(printer.printerName(), QPrinterInfo::defaultPrinter().printerName());
     }
 
     printer.setOutputFormat(QPrinter::PdfFormat);